We'll be pumping ~67% emulsified sulfur from one tank into another. I've been told the viscosity can be as high as 10,000 cP however, I need the flow behavior index (n, unitless) to accurately model it in our hydraulic software.
Absent that information, are there any general guidelines (e.g...
Does anyone have a good reference with rules of thumb for estimating maintenance cost requirements of various types of process equipment compared to capital cost? I have a copy of Plant Design and Economics already but I am looking for something more granular based on the type of equipment. I...
I have seen 24" listed as the maximum size for A234 WPB (seamless) fittings; beyond that they are welded (WPB-W).
Is there a standard that actually specifies this as as the breakpoint?
Additionally, their pressure ratings should both be equivalent to seamless pipe if built to B16.9 (para 2.1)...
I am reviewing a specification for a gas pipeline (material API 5L PSL2) with a minimum temperature of -50F. According to B31.8, this triggers Annex G of API 5L. I am really struggling to sort the actual requirements of CVN and/or DWT testing.
- My understanding is that shear area is calculated...
Has an[u]yone had success with flexibility analyses using API 662 Table 1 for general service allowable nozzle loads on plate and frame exchangers? The allowable loads appear to be extremely low and necessitate two expansion joints per nozzle (in different axes) even for moderate operating...
Most of the submersibles I've seen for industrial wastewater service use dual mechanical seals but it's not clear to me how they cool the seals or keep them clean. Wouldn't buildup occur in the primary seal as the process fluid evaporates across it? How is the secondary seal cooled?
Good evening Steve,
I’m wondering if anyone could point me in a direction for resources in sizing/specifying or reviewing packaged HVAC units for unoccupied spaces. Our office is increasingly responsible for sizing and/or procuring these units. Having enough competence to properly specify or...
Does anyone have experience with using SW for SB pipe in wet CO2 service. I am finalizing specs for a CO2 Capture FEED and am trying to work out whether I should allow SW for SB pipe. Literature online indicates I may need a small corrosion allowance with 316/316LSS for this service (assuming a...
I see that 9.3.10.4 of API 610 states that thrust restraints are required for expansion joints installed at pump discharge for VS1 and VS2 pumps but what about the suction side or other pump types? Are API 610 pump casings designed to transmit axial pressure thrust force to the support structure...
Originally posted in general mechanical but did not receive any replies. This is not an HVAC application but maybe some folks here have some insight...
We are in the final stages of a study and are currently estimating the resources it would take to bring the project from budgetary level of...
We are in the final stages of a study and are currently estimating the resources it would take to bring the project from budgetary level of definition to IFC. I am looking for some information on hydraulically modelling ductwork systems to size large fans (approx. 500,000 cfm @ 20” H2O).
For...
7th Edition of API 2000 para 3.3.2.2.1.b states that liquids with vapor pressures over 0.73 psi are defined as being volatile and therefore have out-breathing increased beyond that of nonvolatile liquids. Due to the ambiguity of "psi" and relatively low pressure specified, I am looking to...
I'm looking for confirmation that I can specify a 12" OS&Y gate valve with a gear operator. My overall goal is to put the wheel perpendicular to grade so that a chain can be used. As is, a handwheel would be a bit too far above grade for an operator to reach and I don't have much room to add in...
